Originally Posted by Four Low

The Dealer has no line on TSBs- that's "Corporate". What we all can-and should- do is call Chryslers "Hot Line" 1-800-992-1997/ 1-877-426-5337 and express our concern about this issue; Since it is a TSB being implemented, it has a safety issue (over heat= FIRE) The NHTSB might act on complaints too, and light a fire under Chrysler to get the TSB domestically ordered (No pun intended) My dealer=$ 75 per hr

Originally Posted by jjntj2003

Is this just happening when towing or offroading?

Originally Posted by Four Low

No. Apparently, even on pavement; for the "Facts", use the Search Function, and you will find lots of info- not to Panic, remember, the sensational few drowns out the vast majority that are boringly trouble -free.

Originally Posted by Runewolf1973

So would you say then that the vast majority of automatic JK owners don't have overheating tranny problems even without an aftermarket cooler? That would be good news. The additional tranny cooler should be an option, not an absolute necessary upgrade on a vehicle that is supposedly "Trail Rated", whatever that means.

Originally Posted by Sahara_Maverick

What "trail rated" means, in the words of Jeep/Chrysler.

http://www.youtube.com/watch?v=IrPoU...e_gdata_player

Reading this and other threads leads me to the conclusion that the stock tranny cooling system is OK for mild use. Once someone goes above the curve the system seems to fail miserably. Jeep/Chrysler escape by not being clear about what the Jeeps are able to do.

It's a shame, since it appears that the vehicle's survivability is no longer the same that made it famous. I agree that some folks are edge cases and push it beyond its design limits. However, it would help a lot knowing what those limits are.

In my case, I own a JKU with an auto tranny and already added an extra cooler to my to-do list. Simply cannot toleratey Jeep failing me because I may have pushed it beyond a limit I am not sure about.

Originally Posted by Runewolf1973

So then would the snowy trails in that Youtube video be considered mild use?

Originally Posted by toad

In regards to the autos overheating....

Way back when, when the JKs first came out and us 07s were learning about all the bugs the jeep had, we found ourselves hearing a random ding going up long, steep inclines. We finally figured out it was the engine getting hot. Therefore, whenever we go up long, steep inclines, we drop the transmission into 2nd gear and take our time going up.

Some have got transmission coolers to correct this problem. Since I have an 07, and I know about this problem, I know how not to overheat my engine. When off-roading, don't climb the hills in 4HI. This will certainly overheat your engine. Keep the JK in 4LO when going up steep climbs and your engine will not overheat.

I do not have a trans cooler. You are more than welcome to purchase one if it eases your mind. I've found that if you drive the jeep in the correct gears when climbing or driving up inclines, that you don't necessarily have to have the cooler. Again, off-roading...4LO, changing from 1st, to 2nd to drive...depending on the obstacle and terrain. On steep inclines on-road...drop it into 2nd gear. This way, your engine isn't working so hard, therefore it shouldn't overheat.

Originally Posted by desertbuzz

JKs made here come with dual fans (standard OEM electric + a mechanical fan hidden in a big shroud (pic)

Also they come with a factory installed OEM auto trans cooler (Pic) exactly because of the 42RLE's tendency to overheat under severe conditions.